Table 2.
The different characteristics of synovial fluid between ankylosing spondylitis and rheumatoid arthritis
| Characteristic | AS (n = 42) | RA (n = 47) | p value |
|---|---|---|---|
| White blood cell, /mm3 | 8,650 (6,700–10,700) | 7,800 (6,050–9,900) | 0.055 |
| Neutrophil, % | 61.8 (57.9–69.2) | 65.7 (59.5–73.0) | 0.125 |
| Monocyte, % | 7.7 (6.6–9.2) | 7.8 (6.4–9.1) | 0.987 |
| Lymphocyte, % | 27.1 (21.2–32.0) | 23.9 (16.2–30.2) | 0.066 |
| Eosinophil, % | 1.4 (0.7–3.0) | 1.5 (0.8–2.6) | 0.786 |
| TNF-α, pg/mL | 127.6 (94.2–378.2) | 336.5 (139.4–553.0) | 0.016 |
| IL-17, pg/mL | 36.3 (18.9–54.1) | 45.8 (18.0–70.4) | 0.409 |
| IL-23, pg/mL | 511.6 (329.4–753.9) | 459.7 (314.3–1211.9) | 0.562 |
AS, ankylosing spondylitis; RA, rheumatoid arthritis; TNF-α, tumor necrosis factor-α; IL, interleukin.